Messier 66 is a Spiral Galaxy in the Leo constellation. Messier 66 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year.
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Here's the graphic of its energy spectrum made with Simbad:
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I've analyzed the simbad dot plot. I have selected 6 points and I have converted µ from to armstrong. Then I applied the formula of the dossier.
SCIENTIFIC ARTICLES:
I have compared my results with a scientific article (https://academic.oup.com/mnras/article/425/2/1257/1191865). In it he explains that the elements found in Messier 66 are oxygen and hydrogen.